某大型工程冷却塔碎石桩复合地基施工过程中出现地基承载力下降的质量问题。原因是粘土层透水能力差，地下积水，基坑积水，当采用强力振动方法施工时超孔隙水压力不能迅速消散。为此采用了隔行跳打，减少一次投料量及增加投料次数、清除环基“橡皮土”等措施。最终塔基处理达到了设计要求。 The quality problem of ground bearing capacity deteriorating during the construction of a large engineering cooling tower gravel pile composite foundation . The reason is that the clay layer has poor permeability, underground water accumulation, and pit water accumulation. When using the strong vibration method, the excess pore water pressure cannot be quickly dissipated. To this end, interlaced hops were used to reduce the amount of feeds and increase the number of feeds, and remove the “rubber soil” of the base. The final tower treatment achieved the design requirements.